adding in logging

vendor/go.uber.org/zap/common_test.go

@@ -0,0 +1,57 @@
+// Copyright (c) 2016 Uber Technologies, Inc.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+package zap
+
+import (
+	"sync"
+	"testing"
+
+	"go.uber.org/zap/zapcore"
+	"go.uber.org/zap/zaptest/observer"
+)
+
+func opts(opts ...Option) []Option {
+	return opts
+}
+
+// Here specifically to introduce an easily-identifiable filename for testing
+// stacktraces and caller skips.
+func withLogger(t testing.TB, e zapcore.LevelEnabler, opts []Option, f func(*Logger, *observer.ObservedLogs)) {
+	fac, logs := observer.New(e)
+	log := New(fac, opts...)
+	f(log, logs)
+}
+
+func withSugar(t testing.TB, e zapcore.LevelEnabler, opts []Option, f func(*SugaredLogger, *observer.ObservedLogs)) {
+	withLogger(t, e, opts, func(logger *Logger, logs *observer.ObservedLogs) { f(logger.Sugar(), logs) })
+}
+
+func runConcurrently(goroutines, iterations int, wg *sync.WaitGroup, f func()) {
+	wg.Add(goroutines)
+	for g := 0; g < goroutines; g++ {
+		go func() {
+			defer wg.Done()
+			for i := 0; i < iterations; i++ {
+				f()
+			}
+		}()
+	}
+}